Hogwarts: the Mystery of Time

[Elizabeth Lily Potter] She has multiple identities, Harry Potter's sister, Sirius Black's goddaughter, Albus Dumbledore, Gellert Grindelwald as her guardian, Bathilda Bagshot as her guide... She has multiple names, Ariana Karenina, friend of unicorns, patron saint of magical animals, sister of the Boy Who Lived, Georgiana Dumbledore. 1991 Was destined to be no ordinary year. This was not just because of the admission of the Boy Who Lived. What was not known to everyone was that there were two freshmen who had grown up in prison that year. When Ariana came to Hogwarts, she was not surprised. Instead, she felt an inexplicable sense of familiarity, as if she belonged here. The dreams that always accompanied her became more and more frequent, the strange words of the Sorting Hat, the big book that inexplicably appeared in the restricted section of the library, the changes in the Forbidden Forest and Hogwarts... Behind this, are there many secrets? Is the peaceful black lake really peaceful? Is that mysterious man really the final boss who stirred up the storm? Are there many unknown secrets in this? Was Grindelwald really defeated by Dumbledore? What is hidden in this? Why did the Big Four suddenly disappear thousands of years ago? All of this seems to have kicked off with Elizabeth entering Hogwarts... Newbie writer, please give me some advice.